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Ionic Formula For Aluminum Sulfate
Nowadays, the ionic formula is used for aluminum sulfate. For aluminum sulfate, it is also a compound formed by aluminum ion and sulfate ion. The valence of aluminum is + 3, and the valence of sulfate is -2. To form an electrically neutral compound, the number ratio of aluminum ion and sulfate ion must be in the inverse ratio of the valence, so that the positive and negative charges can be offset.
From the valence crossover method, it can be obtained that the ionic formula for the combination of aluminum ion ($Al ^ {3 +} $) and sulfate ion ($SO_ {4} ^ {2 -} $) is $Al_ {2} (SO_ {4}) _ {3} $. Cover 2 dollars\ times (+ 3) + 3 times (- 2) = 0 $, so that the compound can be electrically neutral.
From the valence crossover method, it can be obtained that the ionic formula for the combination of aluminum ion ($Al ^ {3 +} $) and sulfate ion ($SO_ {4} ^ {2 -} $) is $Al_ {2} (SO_ {4}) _ {3} $. Cover 2 dollars\ times (+ 3) + 3 times (- 2) = 0 $, so that the compound can be electrically neutral.
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